wiring needed for a quick start 51 Flat in a 39 pickup

[3739ford70]

Hey guys
I just put a 1951 Flathead in my 39 1/2 ton. The original wiring is toast and there is no battery. I will do the wiring later but I need to be certain this motor is good. Turns over freely and has an old rebuild tag. looks clean inside looking in from the fuel pump hole. but that doesnt mean its all good.

What is the simplest way to wire up the 51 to run? I guess as if it was on a run stand. Would a 12V battery roast that starter? and coil? do i get a 6V battery?

Thanks!